From a box containing 2 red, 6 white and 5 black balls, a ball is randomly selected. What is the probability that the selected ball is black?
A
2/13
B
5/13
C
5/11
D
5/6
E
11/13
Verified Correct Answer: B.
Step-by-Step Mathematical Solution
2r, 6w, 5b balls
Total balls = 2 + 6 + 5 = 13 balls p(black) = 5/13
Source: Myschool Past Questions Archive (Record #23790)